Answer:
Step-by-step explanation:
a) Yes.

b) Yes

c) Yes

d) No

I don't get what you mean can u pleez give me information what i have to do
Answer:
Step-by-step explanation:
c.d. d=8-3=5

The distance in kilometers in scientific notation 
<h3>Scale factors</h3>
Scale factors are values or constants multiplied with a variable
If Alvin and Simon raced a distance of
kilometers and they need to race 7 times that distance in a kilometer, the distance traveled will be:
- Distance travelled =

- Distance travelled =

Hence the distance in kilometers in scientific notation 
Learn more on distance here: brainly.com/question/23848540
225.45
+90.32
______
315.77
Nearest whole number
316